Pantographic scribing instrument



Sept. 16, 1930. H. KAssEBAuM 1,775,904

PANTOGRAPHIC SCRIBING INSTRUMENT Filed oct. 1s. 1927 Patented Sept. 16, 1930 UNITED STATES HEINRICH XASSEBAUH, F HALLE/SAALE, GERMANY PANTOGBAPHIG SCBIBING INSTBUMEN T Applicttion led October 18, 1927, Serial No. 228,995, and in Germany July 85, 1927.

Pantographic scribing instruments have become known which comprise a writing frame guided on the surface to be written uponby a stylus producing the types, by a f: pin in the engraved character-grooves of an alphabet-strip, and by another pin in a groove n extending parallel to the al quently ha pens that the guide-pin slips out of the gui e groove during the writing.

This invention has for its object to avoid this inconvenience.

An embodiment of the invention is illustrated by way of example, in the accompanyin drawing in which 'ig. 1 shows the instrument ready for writing.

Fig. 2 is a section on line 2 2 of Fig. 1. In a rule a guide-groove n of circular cross section is arranged which opens thru a slot a in the top of said rule. A guide-pin in the rear end of the instrument terminates in a ball k which fits into the groove n.

For using the instrument the ball 7c has to be introduced at the end of the rule into the groove n so that the shaft of the ball can move with clearance in the slot s and the instrument can be slightly tilted transversely in the groove. Detachment of the writing instrument from the guide-groove n) is impos- 80 sible so that during writing the Writer need merely pay attention to the writing and to the 'ding of the instrument on the alphal. l

ATo facilitate the introduction of the ball k into the groove n the ends of the rule are funnel-shaped.

. The rule may be preferably composed of two halves 11, 12 so that it is possible to polish, prior to the writing, the two halves of the circular groove to facilitate sliding of the ball. The two halves of the rule are fixed on a strip p of glazed board, celluloid or similar material and pushed over the projecting long side of the same behind the parallel T-square, or fixed on a plane table-plate by means of an iron-rule. To prevent slipping of the rule on the surface to be written upon, the lower surface of the rule is lined with emery or with a stri of flint-paper f. The 60 shaft It of the gui e-ball n of the pantophabet. It fregraphic scribing instrument is curved so that, starting from the end of the instrument, it is bent downward so that, the head-end of the writing instrument can be lifted up to the vertical position, this being very advantageous for the handling of the apparatus.

I claim 1. A pantographic scribing instrument comprising a rule having a longitudinally extending guide groove of circular cross sec- 00 tion, said groove opening thru a slot in the' f top of said rule, a pantographic scribing dcvice having a stylus for tracing characters` mounted on said rule, a ball slidably fitting said groove, and a connection between said 55 ball and device passing thru said slot.

2. A pantographic scribing instrument comprising a rule, composed of .two longitudinal sections, said sections being so spaced and having their adjacent edges so shaped as tofform between them a groove of circular cross section with a slot at the top, a support on which said two halves of said rule are fixed, a pantographic scribing device having a stylus for tracing characters mounted on saidrule, a ball slidably fitting said groove, and a connection between said ball and device passing thru said slot. f

. 3. A pantogra hic scribing instrument comprising a rule liaving a longitudinally extending guide groove of circular cross section, said groove opening thru a slot in the top of said rule, the ends of said rule being inclined toward said groove, a pantographic scribing device having a stylus for tracing characters mounted on said rule, a ball slidably fitting said groove, and a connection betlween said ball and device passing thru said s ot.

In testimon whereof I ailix my signature.

H INRICH KASSEBAUM. 

